JavaScript is a high-level, interpreted programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS.
It enables interactive web pages and is an essential part of web applications. The vast majority of websites use it for client-side page behavior.
Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in HTML or XML.
CSS describes how elements should be rendered on screen, on paper, in speech, or on other media.
HyperText Markup Language (HTML) is the standard markup language for documents designed to be displayed in a web browser.
It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.
Expand/collapse widgets help organize content and improve user experience by:
• Reducing visual clutter on the page
• Allowing users to focus on relevant information
• Making navigation easier on mobile devices
• Providing a clean, organized layout